RIN Mitigation and Transmission Performance Enhancement with Forward Broadband Pump

M. Tan, P. Rosa, S. T. Le, V. V. Dvoyrin, Md. A. Iqbal, S. Sugavanam, S. K. Turitsyn, P. Harper

Research output: Contribution to journalArticlepeer-review


We demonstrate that using a broadband, first order, and coherent pump laser enables effective and efficient forward-pumped distributed Raman amplification for long-haul transmission systems, thanks to the simultaneous suppression of ASE noise and RIN-related penalty. We show in both experiments and simulation that this scheme extends the reach of 10 × 120 Gb/s DP-QPSK WDM transmission by a minimum of 50%, compared with low RIN Bi-doped fibre laser and other commercially available pump lasers. Moreover, it requires very low forward pump power, and maintains uniform/symmetric signal power distribution which allows effective nonlinearity compensation.
Original languageEnglish
Pages (from-to)254-257
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number3
Early online date16 Dec 2017
Publication statusPublished - 1 Feb 2018

Bibliographical note

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Funding: UK EPSRC Programme Grant EP/J017582/1 and EP/L000091/1(UNLOC and PEACE), FP7 ITN programme ICONE (608099), MSCA IF grant SIMFREE (748767)


  • Optical fibre communication
  • optical amplifiers


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